Something to note about 50-yr/100-yr/X-yr flood lines: Those are the levels that floods are projected to reach **at least once** every X years. It is NOT a probability statement in the way that many people take it - it does not mean that floods will hit a given level only once every X years.
I doubt that the civil engineer who corrected my long-held misunderstanding would agree that the lines are arbitrary. The lines aren't re-drawn every year; insurance rates & development plans obviously hinge on longer-term projections. It's a tough decision about when to re-draw, because lots of new development brings more paved & low-perm surfaces and increased runoff, but do you wait until the floods happen or try to forecast what will happen, not just because of one project but the totality of many? In relatively undeveloped areas, developers would cry foul, saying "But that area has never flooded", which is likely a correct statement, and local officials have little other data to go on in making their decisions.
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Today's Featured Article - Museum Coverage: The Stuttgart Agricultural Museum - by Cindy Ladage. While cold wind was blowing back in Illinois, in Arkansas, daffodils were in bloom, and the Magnolia trees were adorned with fragrant blossoms. Stuttgart, Arkansas was the site of this year's winter Minneapolis Moline Collector's show February 25-27, 1999. The show was held at the Oliver Museum created by Don Oliver, the pioneer of the four wheel drive tractor. Oliver along with Gale Stroh and Kenneth Bull using Minneapolis Moline tractors and parts created what has become known as
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